Ignition delay-time behind reflected shock waves of small hydrocarbons–nitrous oxide(–oxygen) mixtures
Ignition delay-time behind reflected shock waves of small hydrocarbons–nitrous oxide(–oxygen) mixtures
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DOI：
10.1007/s00193-014-0509-4
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发表时间：
2015-05
期刊：
影响因子：
2.2
通讯作者：
R. Mével;J. Shepherd
中科院分区：
文献类型：
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作者：
R. Mével;J. Shepherd
尽管一氧化二氮已被确认为许多固体推进剂燃烧过程中的重要中间体，但关于一氧化二氮高温氧化碳氢化合物的数据有限。通过激波管实验和化学动力学模拟，研究了含氧和不含氧的小体积烃-NO混合气的着火延迟时间。实验结果表明，氧气的加入显著降低了点火过程的活化能。模拟表明，延迟时间通常是令人满意的预测，但所使用的详细反应模型并不能捕捉到OH*发射分布的所有特征。
Although nitrous oxide has been identified as an important intermediate during the combustion of many solid propellants, there is a limited amount of data concerning the high-temperature oxidation of hydrocarbons by nitrous oxide. In the present study, ignition delay-times of small hydrocarbon–NO mixtures with and without Owere investigated through shock-tube experiments and chemical kinetic simulations. Experimentally, it is shown that the addition of oxygen induces a significant reduction of the activation energy of the ignition process. Simulations demonstrate that delay-times are usually satisfactorilly predicted but that the detailed reaction models used do not capture all the features of the OH* emission profiles.